Synthesis, Spectral, and Single Crystal XRD Studies of Novel Terpyridine Derivatives of Benzofuran-2-carbaldehyde and their Cu(II) Complex

2021 ◽  
Vol 47 (12) ◽  
pp. 909-914
Author(s):  
P. N. Patel ◽  
D. H. Desai ◽  
N. C. Patel
Inorganics ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 44 ◽  
Author(s):  
Mohammed Altahan ◽  
Michael Beckett ◽  
Simon Coles ◽  
Peter Horton

Two zinc(II) hexaborate(2−) complexes, [Zn{κ3O-B6O7(OH)6}(κ3N-dien)]·0.5H2O (dien = NH(CH2CH2NH2)2) (1) and (NH4)2[Zn{κ2O-B6O7(OH)6}2(H2O)2]·2H2O (2), and a zinc(II) dodecaborate(6−) complex, (1,3-pnH2)3[(κ1N-H3N{CH2}3NH2)Zn{κ3O-B12O18(OH)6}]2·14H2O (1,3-pn = 1,3-diaminopropane) (3), have been synthesized and characterized by single-crystal XRD studies. The complexes crystallized through self-assembly processes, from aqueous solutions containing 10:1 ratios of B(OH)3 and appropriate Zn(II) amine complex: [Zn(dien)2](OH)2, [Zn(NH3)4](OH)2, and [Zn(pn)3](OH)2. The hexaborate(2−) anions in 1 and 2 are coordinated to octahedral Zn(II) centres as tridentate (1) or bidentate ligands (2) and the dodecaborate(6−) ligand in 3 is tridentate to a tetrahedral Zn(II) centre.


Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 272
Author(s):  
Seungyeol Lee ◽  
Huifang Xu ◽  
Hongwu Xu ◽  
Joerg Neuefeind

The crystal structure of moganite from the Mogán formation on Gran Canaria has been re-investigated using high-resolution synchrotron X-ray diffraction (XRD) and X-ray/neutron pair distribution function (PDF) analyses. Our study for the first time reports the anisotropic atomic displacement parameters (ADPs) of a natural moganite. Rietveld analysis of synchrotron XRD data determined the crystal structure of moganite with the space group I2/a. The refined unit-cell parameters are a = 8.7363(8), b = 4.8688(5), c = 10.7203(9) Å, and β = 90.212(4)°. The ADPs of Si and O in moganite were obtained from X-ray and neutron PDF analyses. The shapes and orientations of the anisotropic ellipsoids determined from X-ray and neutron measurements are similar. The anisotropic ellipsoids for O extend along planes perpendicular to the Si-Si axis of corner-sharing SiO4 tetrahedra, suggesting precession-like movement. Neutron PDF result confirms the occurrence of OH over some of the tetrahedral sites. We postulate that moganite nanomineral is stable with respect to quartz in hypersaline water. The ADPs of moganite show a similar trend as those of quartz determined by single-crystal XRD. In short, the combined methods can provide high-quality structural parameters of moganite nanomineral, including its ADPs and extra OH position at the surface. This approach can be used as an alternative means for solving the structures of crystals that are not large enough for single-crystal XRD measurements, such as fine-grained and nanocrystalline minerals formed in various geological environments.


2021 ◽  
Vol 6 (4) ◽  
pp. 843-851
Author(s):  
Sharanya Kuthyala ◽  
Sareen Sheikh ◽  
G. K. Nagaraja ◽  
B. R. Kannika ◽  
S. Madan Kumar ◽  
...  

2016 ◽  
Vol 118 ◽  
pp. 404-409 ◽  
Author(s):  
Dmitrijs Stepanovs ◽  
Zenta Tetere ◽  
Irisa Rāviņa ◽  
Viktors Kumpiņš ◽  
Daina Zicāne ◽  
...  

2008 ◽  
Vol 93 (1) ◽  
pp. 210-216 ◽  
Author(s):  
F. M. McCubbin ◽  
H. E. Mason ◽  
H. Park ◽  
B. L. Phillips ◽  
J. B. Parise ◽  
...  

Author(s):  
Feodor Belov ◽  
Alexander Villinger ◽  
Jan von Langermann

This article provides the first single-crystal XRD-based structure of enantiopure (R)-baclofen (form C), C10H12ClNO2, without any co-crystallized substances. In the enantiopure title compound, the molecules arrange themselves in an orthorhombic crystal structure (space group P212121). In the crystal, strong hydrogen bonds and C—H ... Cl bonds interconnect the zwitterionic molecules.


2013 ◽  
Vol 42 (2) ◽  
pp. 422-431 ◽  
Author(s):  
Charlotte Martineau ◽  
Thierry Loiseau ◽  
Lionel Beitone ◽  
Gérard Férey ◽  
Boris Bouchevreau ◽  
...  

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